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PAC Learning, VC Dimension, and the Arithmetic Hierarchy

We compute that the index set of PAC-learnable concept classes is $m$-complete $Σ^0_3$ within the set of indices for all concept classes of a reasonable form. All concept classes considered are computable enumerations of computable $Π^0_1$ classes, in a sense made precise here. This family of concept classes is sufficient to cover all standard examples, and also has the property that PAC learnability is equivalent to finite VC dimension.

preprint2014arXivOpen access
Wesley Calvert
Logic in Computer Sciencemath.LOMachine Learning
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Wesley Calvert

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